Hi Pat, I’m a science editor at the Cornell Lab of Ornithology. We put together a seasonal package of brief stories for our All About Birds web site and print newsletter, and in our winter issue we have a story about bird behaviors at a feeder. Your photo of a White-breasted Nuthatch enacting the wing-spread display at a European Sparrow (from August 20, 2013) is a perfect example of a threat display. May we have your permission to publish it, and if so, could I request the highest resolution possible file you have of the photo? I sent you a personal message via Facebook with my contact info. Thanks in advance for considering this request. – Gustave Axelson